Roof-slab for building construction.



R. M. HAVENS. ROOF SLAB FOR BUILDING CONSTRUCTION. APPLICATION FILED IEB.6.I9I1.

l ,Q6 1,1 25 Patented- Apr. 2, 1918.

l 2 SHEETS-SHEET l- R. M. HAVENS. ROOF SLAB FOR BU1LD|NG CONSTRUCTIQN.

APPLICATION FiLED FEB. 6. 1911- Patented Apr. 2, 1918.

2 SHEETS-SHEET 2 TE @TAES PATENT @hlhllililt RAYMOND HAVENS, 0F KANSAS CITY, MISSOI'IIELI.

` :soon-stan non BUiLnnve CONSTRUCTION.

.70 all whom 'it may concern Be it known that I, RAYMOND M. HAvENs, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Roof-Slabs for Building Construction; and I do 4declare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this speciiication, A

My invention relates to building construction and more particularly to the detail arrangement of a concrete or like slab and its combination with similar slabs and with the walls of a building to forma sightly and durable roof, the principal object of the present invention being to provide roof forming members of such a character that the necessity of building a ridge wall to provide proper drainage slope to the roof is obviated, and wherein a ceiling and roof maybe simultaneously formed and supported on walls having a common level.

Itis also an object of the invention to provide a slab of this character having an eaves trough so that water falling on the roof will be drained into the trough formed by the alining channels in the eaves portions of the slabs and delivered therethrough toward the ends of the building.

In accomplishing these objects I have provided improved details of structure, the preferred forms of which are illustrated in the accompanying drawings, wherein z- Figure I is a perspective view of a building comprising roof slabs embodying. the present invention. l

Fig. II is a transverse section of the building, illustrating the support of the roof slabs on the side and partition walls. i

Fig. III is a detail View of one ofthe roof slabs.

Fig. IV is a detail view of a bracket for supporting slabs at the gable ends of the building. j

Fig. V is a detail view of a preferred form of coping block and its mounting on the roof.

Referring more in detail to thedrawings l designates a building of concrete block Specification of Letters Patent.

rarest-*ea am. 2, reis.

` Application filed February 6, 1917. Serial No. 146,872.

construction having a rectangular floor area and inclosed by opposite end walls 2, side walls 3, a central partition 4C and a roof 5.

In the present structure the inclosing and partition walls are built up to the same level to support the roof forming members, the latter comprising slabs 6 which are made with a greater thickness at one end thanat the opposite and are supported in close rela`- tion on the partition and side walls with the thick ends of the slabs abutting each other and supported on the central partition and extending in opposite directions therefrom to form a ridge 7 whereby the roof is drained toward opposite sides of the building.

In preparing the roof slabs, each is molded to fit a building of pre-determined dimen sions and is made in an I-beam form comprising upper and lower face members 8-9 respectively, joined by a vertical web 10; the

`said faces being spaced at their inner ends to give a desired slope to the roof, are drawn gradually together and merge into a solid slab at the wall line to form an eaves portion l1.

TWith this arrangement when the slabs are assembled to form a roof, the lower faces 9 will form a substantially horizontal ceiling surface for receiving a plaster coat, while the upper faces slope downwardly from the central ridge to drain the roof toward the eaves. j

In constructing the roof slabs, as before mentioned, an eaves portion l1 is formed at the outer end of each member, to project a desired distance beyond the supporting walls and give the building a sightly appearance, the said eaves portion having a channel 12 formed transversely thereacross and registering with similar channels of adjacent slabs, to form continuous channels across the building at its opposite sides whereby water drained' from the roof is delivered to the ends of the building.

To substantially key the roof members together and prevent leakage at the joints, I provide each of the slab face members along one edge with a groove 14; and at its opposite edge with a tongue 15, so that when the slabs are laid in functional position to form the roof the tongues of one slab will seat in the grooves of the adjacent slab, keying the slabs together and 'adding strength to the roof; the preferred arrangement of the tongues and grooves being that wherein the lovver tongues extend only as far as. the Wall lines While the upper tongues extend the length of the slabs.

In some cases it may be desired to place a coping or lire Wall above the eaves of the building as illustrated in Fig. V. In such case the coping blocks 16 are held in spaced relation above the roof by the triangular shaped blocks 17 Which give a substantial bearing surface for the supported blocks and also permits drainage thereunder.

In assembling a roof of this character, the building walls 2-3 and the partition Wall are built to an even height, the roof slabs are then laid on the side walls and partition Wall in close relation, so that the under faces of the slabs form the room ceilings and may be plastered, While the joints between the upper faces may be filled with rich cement to prevent any leakage therethrough. Water falling on the roof will he drained to the troughs at either side and will be carried to the. endS. of the building.

`The slabs which extend beyond the. Wall line to form the eaves at the gable ends of the roof may be supported as shown by brackets 1S or by any other suitable incall,

and if necessarvariations in the construction 0f the sla s may be made to provide space for chimneys or the like.

It is apparent that by so constructing the roof and Ceiling slabs, the supporting Walls may all be built t0 the same horizontal level and the slabs when laid thereon Will provide a slope to the roof Without necessitating the building of a ridge Wall of greater height than the inclosing Walls.

It will also be seen that by so constructing the roof slabs, when properly assembled, an integral and substantially rigid roof and ceiling is provided` that is practically irn-V pervious to Water, owing to the sloping roof and keying of the slabs, is nonconcluctive to heat and cold on account of the air spaces provided by the spacing of the slab faces and owing to the simplicity ofarrangement may be quickly and easily placed.

Having thus described my invention what I claim as new therein and desire to secure by Letters-Patent, is

l. In a roof slab, the combination with a web, of a base flange having an under face constituting a ceiling surface and a top flange having an upper face constituting a roof surface 'and inclined to drain toward one end of the slab, the said end of the slab having an eaves trough therein dovvnset from the plane ef the roof surface.

2. In a roof slab, the combination With a web, of a base flange having an under face constituting a ceiling surface and a top flange having an upper face constituting a roof surface and inclined to drain toward one elld of the slab, the Said end of the slab comprising an eaves trough portion integral with the web and flanges and having a trough therein downset from the plane of the roof surfacel 3. In aI roof slab, a Solid portion having a transverse trough opening'tlll'ough its upper face adjacent one end, a vertical. Web, eX-` tending centrally from the opposite end of S21-id @11d Pelten, and horizontal base and inclined top flangesv on sai'l.vveb merging into said solid end portion, the, top surface of the top fiange being continuous with the top surface of said end portion, for the purpose set forth.

In testimony whereof I alfix my signature.

RAYMOND; M. HAVENS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, ID. C. 

